If you want to remove all comments. Go to the template section, choose Content Area and Blog Post drag Comments on the left to the disabled region on the right. Done.
If you want it on a specific post you can change the meta on that post.
Hope this will do.

Go to Dashboard > Comments and select the comment you wish to hide. Change the status to Mark as Spam or Move to Trash. The latter will permanently remove it. The former will move it to the spam folder, so you can later edit or replace it.